Hi everyone. After experimenting more I think I'm getting more predicable result now. A couple things I had done at home.
- playblast out as PNG sequence. FFmpeg reads jpg sequence much faster with less CPU, but for some reason it always get the aspect ratio of jpg wrong. - force resolution to be divisible by 16. Will have to test it at studio. A couple notes about codecs MJPEG - very fast to scrub through in quicktime even at full HD. Although it's quite larger than h.264. -q:v is the compression. 0 = no compression, 25 max. working command = ffmpeg -y -i d:\temp\test.%4d.png -r 30 -vcodec mjpeg -pix_fmt yuv420p -q:v 10 -f mov -an mjpegQV10.mov H 264 - A little slower to scrub timeline but file size is much smaller. Needs to keep bframe low to help with timeline scrubbing. Eventually I just disabled it (-bf 0). crf seems to be the quality, if set higher than 25 the result gets splotchy. working command = ffmpeg -y -i d:\temp\test.%4d.png -r 30 -vcodec libx264 -vprofile baseline -crf 22 -pix_fmt yuv420p -bf 0 fromPng.mov best regard, P Chong. On Sat, Sep 29, 2012 at 1:06 AM, Panupat Chongstitwattana < panup...@gmail.com> wrote: > Hi all. > > @ deanareeno. Yes I was using quicktime player! But the output also shows > up weird on VLC and WMC too. I'm guessing I'm not using the codec right :( > > After a lot of experimenting, the problem seems really random. Usually the > first few times after restarting, the conversion seems to be fine. After > that it's almost always screwed up. I tried lots of standard resolution > 720p, 800x600, 320x160, the problem seems to show up on all of them. Except > 1920x1080... really weird. > > But I had an idea on my way home that maybe Maya's compression isn't > playing nice with ffmpeg. I'll try playblast to image sequence tomorrow and > see what happens. > > > > On Fri, Sep 28, 2012 at 10:54 PM, Mark Jackson <mark...@gmail.com> wrote: > >> http://markj3d.blogspot.co.uk/search/label/Playblast >> >> not sure if any of that helps, but we've been through a lot of pain in >> the past with Codecs! >> >> >> >> On 28 September 2012 16:24, Emre Yilmaz <eyil...@pobox.com> wrote: >> > >> > One thing the OP said that jumped out for me-- "Is it because h.264 >> doesn't >> > like my resolution? When I playblast at 1920x1080 it seems to always >> work." >> > >> > How much choice do the users of your tool have over image size? >> > >> > While I'm not familiar with ffmpeg on windows, I have a memory that >> h.264, >> > MPEG-4 and similar encoders can be a little finicky about image sizes >> and >> > dimensions. My memory is that it isn't so much the overall size, but >> that >> > the dimensions need to be a multiple of some underlying block size, >> like 4x4 >> > or 16x16, though I don't recall specifics. Anyhow, if the pattern >> you're >> > seeing is "certain dimensions work and others don't"-- for instance >> let's >> > say supplying dimensions 1920x1080 always worked, but supplying >> dimensions >> > 1921x1081 often didn't-- this may be an underlying issue you may want to >> > look into. >> > >> > >> > >> > On Fri, Sep 28, 2012 at 6:49 AM, deanareeno <deanare...@gmail.com> >> wrote: >> >> >> >> Are you using Quicktime Player to play the .mov file on Windows? In the >> >> past that's the only time I've experienced 'messy green' when viewing >> back >> >> playblasts. Solved by doing the following in Quicktime Player: >> >> >> >> Edit > Preferences > Quicktime Preferences > Advanced > Video > click >> >> 'Safe Mode (GDI only)' >> >> >> >> Try that, or try another player (like RV, or VLC, etc.) >> >> >> >> If that doesn't work the it's back to the drawing board. >> >> >> >> Cheers, >> >> >> >> -DW >> >> >> >> >> >> >> >> On Friday, September 28, 2012 9:35:44 AM UTC-4, Panupat wrote: >> >>> >> >>> Using Zeranoe ffmpeg build for windows. >> >>> >> >>> I'm sending playblast video (YUV compression) to ffmpeg for h.264 >> >>> compression outputting to Quicktime mov. But I'm having problem that >> >>> sometimes the output video has messy green screen added to the end. >> (for >> >>> example, 90 frame avi, got 50 frames of messy green added to the end) >> >>> >> >>> The problem doesn't seem persistant, if I restart windows, the first >> few >> >>> playblasts wouldn't have this problem. After a while tho it'd start >> doing it >> >>> randomly. Tried it on multiple machines and got the same result. >> >>> >> >>> Is it because h.264 doesn't like my resolution? When I playblast at >> >>> 1920x1080 it seems to always work. >> >> >> >> -- >> >> view archives: http://groups.google.com/group/python_inside_maya >> >> change your subscription settings: >> >> http://groups.google.com/group/python_inside_maya/subscribe >> > >> > >> > -- >> > view archives: http://groups.google.com/group/python_inside_maya >> > change your subscription settings: >> > http://groups.google.com/group/python_inside_maya/subscribe >> >> >> >> -- >> ------------------------------------- >> Mark Jackson >> Technical Animation Director >> http://markj3d.blogspot.com/ >> >> -- >> view archives: http://groups.google.com/group/python_inside_maya >> change your subscription settings: >> http://groups.google.com/group/python_inside_maya/subscribe >> > > -- view archives: http://groups.google.com/group/python_inside_maya change your subscription settings: http://groups.google.com/group/python_inside_maya/subscribe
